In a large bowl, stir sugar and cinnamon to blend well. Add half-and-half, cream and vanilla and stir until sugar dissolves. If desired, cover and chill to develop flavor.
Pour into a chilled 2-quart ice cream freezer container. Pack and churn according to manufacturer's directions. Remove dasher. Stir in nuts. Serve soft or pack to ripen
Serve over apple pie, apple crisp or baked apples; also delicious with Caramel Sauce on top.